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¿Question #221463?
Tim Synge: Have you ever used an abacus?

pwilz: I've multiplied two numbers on one once, but that's about it. I think I've asked this question before.
BOBBYCAN: I remember playing with one in grade school, but not actually using it.
Ruesailmana: Yes. But probably not to the fullest.
pricero1: I have a Chinese abacus, which is a really fancy-dan thing, which one could use for all sorts of computations. But I don't...